Fuel-feeding system for internal-combustion engines



March 17, 1925. 1,529,938

A. UNDERWOOD FUEL FEEDING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed March 2, 1922 2 Sheets-Sheet l Patented Mar. 17, 1925.

ARTHUR unnnawoon, or wesrrrueron, nrsrnicr or COLUMBIA;

FUEL-FEEDING SYSTEM FOR INTERNALGOMBUSTION ENGINES,

Application filed March 2, 1922. Serial No. 549,596.

T aZZ whom it may concern:

Be it known that I, ARTHUR UNDnnwooD, a citizen of the United States of Amerlca,

' and a resident of WVashington, in the Disutilize the suction in the manifold of an engine for supplying the engine with liquid fuel from a fuel tank disposed at a lower level than the carbureter, all of which embody a plurality of springs, valves and other moving parts, which parts add greatly to the cost of manufacture and are likely to become inoperative under the severe conditions of operation to which they are subjected. It is an object of this invention to devise means for reducing the number of these moving parts to a minimum in a fuelfeeding system which is actuated by the suction of an engine.

In devices of this nature it has been found necessary to provide the vacuum chamber or reservoir with separate inflow and outflow connections, or with valve means, springs, etc, for controlling the outflow connections admitting atmospheric pressure to said chamber or reservoir, etc.

Further objects of this invention are to eliminate valves between the vacuum chamher and the inflow and the outflow connections; to provide an improved valve mechanism for controlling the suction connection to the engine manifold; and to provide a device which is simple in design, inexpensive to manufacture and highly eflicient in practical operation.

The inventive idea, set forth herein, is capable of being embodied in a variety of mechanical structures, two of which, for the purpose of illustrating the inventive idea, are shown in the accompanying drawings, but it is to be expressly understood that the drawings are for the purpose of illusnitration only, and are not designed to define the limits of this invention, reference be ing had to the appended claims for this purpose.

In the drawings Fig. 1 is aside view, partly in section, of my improved fuel feeding device;

Fig. 2 is a top plan view; I Fig. -3 is an end view, partly in section; 311C Fig. 4 is a side view, partly in section, of another embodimentof the invention.

In the form shown in Figs. 1, 2 and 3, a receptacle 10 of any suitable size, shape and proportions is mounted in any suitable way and connected to the source of fuel and the carbureter or other fuel-consuming element of the engine. Preferably, receptacle 10 is located adjacent to and above the carbureter or other fuel-consuming element and connected, as by a pipe 11 eXtending through its bottom, with the 'carbureter. The reservoir is illustrated as open to the atmosphere at its top, but anysuitable cover (not shown), provided with an atmosphere inlet, may be secured to saidv reservoir to insure against loss of fuel contained thereln p in said receptacle is a chamber or vacuum Fivotally mounted in any suitable way.

tank 12, the axis of movement of the same being offset with respect to its center of gravity so that said tank tends to tilt around its axis as hereinafter explained. In the construction illustrated, the reservoir or receptacle 10 is provided with an L-shaped' supporting bracket 14 (see particularly Fig. 3) and the chamber or vacuum tank 12 is eccentrically pivoted on a bolt 15 which is threaded into the bracket and passes through a tubular sleeve 16 formed in any i 95 suitable way in thetank 12.

(lommunicatlng with the lnterior of the fuel reservoir or receptacle 10 1s a connection leading to a source of suction which is preferably the intake manifold of the engine. In the construction illustrated, the

L-shaped bracket is utilized as the connection and is bored transversely of its horizontal inwardly directed end to provide the passage or port 17 which may be connect ed with the intake manifold by a pipe 18 communicating with said passage. Mounted within the bracket for reciprocation transversely of its passage 17 is a tubular valve member 19 having the interior passage 20 and artransverse opening 21 com- 1 municating therewith in such position that it will communicate with passage 17 or move opposite thersolid portion of the wall of the passagel? as said tubular valve memher is reciprocatedback and forth as hereinafter explained. .One end of the valve member is providedwith a vertical flange 22, while the opposite end of the valve -member isprovidedwith any suitable form .of stop 23'.t0"prevent"its movement beyond a predetermined limit.

The chamber orvacuumtank 12 is constructed 'in any suitable way so that an opening ."therein will, move into and out of register with the open endv of the passage 20[ in the valve member 17. In the construction illustrated, a box-like projection or de 'flectingmember 2,4 is suitably'secured, as by soldering, 'to the exterior wall of the I tank 12, and has in its side facing the valve member 19'; and preferably at one end of its lateral face, an opening 25 of substantially 'the same size as the opening through .the "passage 20. f The 111l36l10l of the box-like I extension 24 communicates with the interior offthet-ank 12 by a small aperture 26 which is preferably disposed at theoppositeend of said box-like extension, so that any-fuel which maybe drawn through said aperture 26 'into the box-l-ike extension 2% will not 45. i I, thereto and the outflow of fuel therefrom. In the form shown a pipe or conduit 27 is Munder side and to prevent accumulatioirof dirt from obstructing the inwardly directed be .drawndireetly through'the aperture 25 intothe. connections to the intakemanifolda In place of the construction illustrated, however,anyother suitable means may be employed for preventing any fuel which may 'be drawn "into said. box-like extension fro-m -passing directly into the suction con =nection s. v The vacuum tank. or chamber 12 is also suppliedin any suitable way with inlet and outlet connections and, for simplicity of construction, the same connection ispreferably; used for,- both the admission of fuel introduced into the tank- 12 through its end of said pipe, 'the latter may be closed at its "innerJend provided with lateral open ings 28 for communication \Vll'h: the interior of the tank. Said pipe extends downwardly within the receptacle 10 and is preferably firever-sely curved for'ta. purpose to behereina-fterdescribed. .The receptacle 10 .is also provided-with an inflow connectionor con- ;duit 29 which may be sup-ported.from the 'wall of the receptacle in any suitable way being shown as 'mounted in .the =X-shaped ,bracket 14 heretofore described... The outer end of-gthe,connection29 extends to a fuel it-ank; positioned many desired location but ordinarily at 'aflevel below that of the reemptyingof the-tank 12.

ceptacle 10. The inner ends of the inlet 27 and the inflow connection 29 are in alinement and adapted to'be in. engagementwhen the vacuum tank 12 has its aperture 25 in register with the end of the passage 20 in the valve member.

The vacuum tank l2v is also provided with any suitable float for holding the vacuum tank with its aperture 25 disconnected from the passage through the valve member 19 when the level in the receptacle 1O rises above a predetermined limit. lVhile the float may take a variety of forms,,tlie construetion shown in Fig. 1 comprises an air chamber 3O having a downwardlydirected open end extending to a level such that it is -normally submerged in the fuel in the receptacle 10. Saidair phamberz may be formed integrally With theyacuum tank 12 or may be attached thereto 'in anysuitable y the-tank .12 and is desirably provided'witlr an upstanding arm 32 which is adapted to engage theoutwardly projectingen'd 23 of the valve .19: and positively move its aperture 21 opposite the s olid portionof the wall 3 of the passage 17 i in the event that said valve :memberis not drawn into the last-named position by the suction tending to holdthe surface of the flange 22=against the face of the box-like extension 24'.

If desired, the intlo-wconnection29 may be provided with any suitable form of check-valve 33-to prevent the column of. oil

within the piping leading from the fuel tank to receptaclelO from flowing back into said tank at the rear end of the .car when rthe connection, between the inflow connection. 29 and theinlet 27wis broken by the It .will be perceived that thelowery end of the reversely-curved inlet or conduit 27 positionedv below' the open end of air chamber 30. Any air that maybe drawn into the chamber with the fuel will escape upwardly into said chamber to replenish the .air therein.

If for any reason the inlet 27 should abut againstinflowconnection 29 in such a manner that leakage occurs at this point, no objectionable result ensues since the butt connect on 1s normally submergedun the fuel 1n reservoir 10.

Since. the rese1'vo1r10 1s..usually above the level of .thesource of the/fuel. supply, the

pivotally mounted, chamber and reservoir will normally be empty. The'pos'ition' of through and opening 21 the chamber 12, in this condition, is such that inlet 27 registers with inflow connection 29, opening 25 in projecting element 24 registers with the passage 20 in valve member 19, and the transverse opening 21 is in communication with passage 17 \Vhen the engine is started, suction will be established the above mentioned openings and passages to the intake manifold of the engine and a partial vacuum thus established in chamber 12 will result in the elevation of fuel through connection 29 and inlet 27 into chamber 12. lVhen the fuel reaches a predetermined level in chamber 12, the chamher will be overbalanced and will move to the position shown in dotted lines in Fig. 1. During this movement, the suction will tend to maintain the butt connection between valve member 19fa'nd the face of the boxlike projection 24. This tendency will cause the valve to move with the chamber will be moved opposite the solid portion of thus closing the suction connection to the engine manifold. Should this movement of the valve not take place for any reason, arm 82 will engage the outwardly projecting end 23 of the valve 19 and positively move the valve and close the suction connection. The movement of the valve is more limited than that of the chamber and when the connection between the two is broken, further movement of the valve being prevented by stop means 23, atmospheric pressure is admitted to the chamber through openings 25, 26; the fuel contained therein escapes through inlet 27 into reservoir 10, and thence by gravity through outflow'connection 11 to the float chamber of the carbureter. W'hen' emptied of its fuel in this manner, the chamber 12 is overbalanced in the opposite direction by weight 31, whereupon the chamber returns to the empty or filling position, reestablishingthe butt con-' nections between the flange 22 of valve '19 and the faceof the box-like projection 24 and between inlet pipe 27 and inflow connection 29. This cycle of operations is continued until the liquid discharged by chamber 12 into the reservoir 10 reaches a predetermined 1 level whereupon the float member 30 acts to move the chamber to or maintain it in the discharging position, shown in dotted lines in Fig. 1, regardless of the fuel contained therein. Additional fuel will not be introduced into the chamher or reservoir until the level of the liquid in the reservoir has been sufficiently lowered, by the discharge through the carbureter, to render the float incapable of holding the chamber out of filling position, whereupon the above-described cycle of operations will be resumed.

In Fig. 4 is shown an embodiment of the invention wherein a float, member is profrom a rod 42.

the wall of the passage 17,.

the rod vided for positively controlling the suction connection to the engine manifold when the fuel in the reservoir 10 has reached a predetermined level. Vhile thefloat and its con-- nections may take a variety of forn is,tl1e

construction shown in Fig. 4 com'prlses an air chamber 34havmg a downwardly directedopen end which is normally submerged in the fuel inreceptacle 10. Attached in any suitable way to the upper end of said chamber is a vertically disposed rod 85, pivotally attached,as at 36, to the lower arm of a suitable bell-crank lever 37, pivoted, as at 38, to an arm 39 which may be secured to the L-shaped bracket14. The upper arm of lever 37 is suitably connected, as by a longitudinally extending opening or slot 40, to a pin 41 rojecting transversely If cesired, the upper arm may be bifurcated to engage pin 41 on both sides of rod42. Thisrod is adapted to re.- ciprocate backjand forth in the passagel of valve 44 as hereinafter explained. Suitable guide means may be provided to prevent lateral movement of the float or air chamber 34. In the construction illustrated, an'ar m 45 is provided with an open ing, in one end thereof, adapted to engage while the opposite end of said arnr is suitably secured to the L-shaped bracket 14, at a point such that the vertical oscillation of the air chamber 34 will not be reservoir 10 has been sufficiently lowered, by i the discharge through the carbureter, ;to render the float ineffective, whereupon the weight of the float or a1r chamber 34 actuates lever 37 to move rod '42 in the opposite direction until the transverse openin'g'47- is again uncovered, when suction to chamber 46 will be reestablished," j

Any suitable stopmeans maybe provided for limiting the movement of the vacuum chamber or tank. In the embodiment shown in Fig. 4, an arm 48 is secured to reservoir "10 in a position such that it coac-tswith a lateral face of box-like projection 24 to'limit the tilting movement of the chamber or vacuum tank, wherebyweig'ht 31is always maintained in a position, relative to the axis of movement passing through bolt 15, such that it tends to return saidohamber to'the filling position. j j j a It will therefore be perceived that I have provided a fuel feeding device for engines in which thenumber of moving part-s .has een. reduced to a minimum. This feature is of prime importance from the standpoint of the user since it insures continuous operation and durability even under themost severe operating conditions. The simplicity of the device is offurther value when considered from the manufacturing standpoint, since it insures economical production.

While twoembodiments of the inventive idea have been described herein with considerable particularity and detail, it is to be expressly understood that the invention is not limited thereto, as the same is capable of-a. variety of expressions, some of. which will readily suggest themselves to those ervoir, a suction connection to the intake therein.

skilled in the art, while certain features thereof are capable of use without other features thereof. Reference is therefore to be had to the claims heretoappended for a definition of the limits of the invention.

What isclaimed is I 1 A fuel feeding system for engines including a reservoir having an inflow connection to a fuel tank disposed at a lower level and having an outflow connection to a carbureter, a valve in said inflow connection, a chamber pivotally mounted in SiLlCl'IGSQIVOlI' and having an inlet which registers with the inflow connection in one position of said chamber, said chamber being pivotally mova bleunder the weight of fuel therein to ,empty through said inlet into said reservoir,

a suction connection to the intake manifold of the engine, and valve mechanism controlled by the pivotal movement of said chamber for connecting and disconnecting said suction connection with said chamber.

2. A fuel feedingsystem for, engines invclu dlng a reservolr havlng an inflow connection to a fuel tank disposed at a lower level and having an outflow connection to a carbureter, a valve in said inflow connection, a. chamber pivotally mounted in said reservoir and having an inlet which registers with the inflow connection in one position of said chamber, said, chamber being pivotally movable underthe weight of fuel-thereinto empty through said inlet intosaid resmanifold of the engine, valve mechanism controlled by-the pivotal movement of said chamber. for connecting and disconnecting said suction connection with said chamber, and float means for actuating said valve mechanism independently of'the movement ,ofsaid c-hamberunder the Weight of fuel 3. A fuel feedingsy-stem for engines including a reservoir having an inflow connection to a fuel tank-and having an outflow connection to a carbureter, a. chamber movably mounted in said reservoir and havanihlet Whichregiste-rs with the-inflow connection in one position of said chamber,

said chamber moving under. the weight of fuel flowing thereinto to. empty through said inlet, a suction connection to the intake man- .ifold of the engine, and valve mechanism controlled by the movement of said chamber toward and away fromsaid mechanism for connecting and disconnecting said suction mounted in said reservoir'an d having an inlet which registers with the inflow connec tion in one position of said chamber, said chamber moving under the Weight of fuel flowing thereinto to empty. through saidin-v let, a suction connection to t-heintake manifold of the engine, and valve mechanism controlled by the movement of said chamber.

for connecting and disconnecting said suction connection with said chamber, and means positioned exteriorly of said chamber whereby fuel flowing. into said chamber cannot be drawn directly into said suction connection. 1

5. A fuel feeding system for engines including a reservoir havingan inflow connection to a fuel tank and having an outflow connection to a carbureter, a, chamber movably mounted insaid reservoir and having an inlet which registers with the inflow connection in one positionof said chamber,

said chamber movingunder' the weight of fuel flowing thereinto to empty through sa d nlet, asuction connection to the intake manifold of the engine, valve mechanism I controlledby the movement of said chamher for connecting and disconnecting said suction connection with saidchamber, and float means for actuating said valve mechanism independently of the movement of said chamber under the weight of fuel therein.

6. A fuel feed-ingsystem for engines including the combination of areservoir having'an inflow connection from a source of fuel, and an outflow connection adapted to be connected witha carbureter, a chamber pivotally mounted in; said reseiwoir and having an inlet adapted to register below the normal level of the fuel; in said res- 'ervo-irnvith said inflow connection in the filling position ofsaid chamber, said cham ber IIIlOVlllg under theweightof fuel-flowing thereinto to empty through said inlet.

7. A fuel feeding. system 'for engines including the combination of a reservoir-having'an inflow connection froma source of fuel, and-anoutflow connection adapted to be connected with a carb ureter, a chamber movablymounted insaidweservoir and-having inlet pipe adapted to 'regi'sterwith said inflow connection in the filling position of said chamber, said chamber moving under the weight of fuel flowing thereinto to move said inlet pipe upwardly and away from said inflow connection and to empty through the same, and means including a connection with the intake manifold, where ing under the weight of fuel flowing there into to empty through said inlet, means including a connection with the intakemanifold, whereby suction is admitted to the interior of said chamber to fill the same,

and means operated by the movement of said chamber for connecting and disconnecting said suction connection with said chamber.

9. A fuel feeding system for engines including the combination of a reservoir having an inflow connection adapted to beconnected with a source of fuel, and an outflow connection adapted tobe connected with a carbureter, a chamber movably mounted in said reservoir and having an inlet adapted to register with said inflow connection in the filling position of said chamber, a suction connection to the intake manifold of the engine, and means rendered effective by suction for closing said suction connection.

10. A fuel feeding system for engines including the combination of a reservoir hav- Y ing an inflow connection adapted to be connected with a source of fuel, and an outflow connection adapted to be connected with a carbureter, a chamber mo-vably mounted in said reservoir and having an inlet adapted to register with said inflow connection in the filling posit-ion of said chamber, a suctionconnection, and rectilinear movable means rendered effective by an element carried by said chamber for closiiig said suction connection,

11. A fuelfeeding system for engines including the combination of a reservoir having an inflow connection adapted to be connected with asource of fuel, and an outflow connectionadapted to be connected with a carbureter, a chamber movably said reservoir and having an inlet adapted to register with said inflow connection in the filling position of said chamber, asuction connection, and a valve, flanged at the opposite ends thereof, rendered effective by suction for closing said suction connection,

balanced in one mounted 111 "and an element carried by said chamber for 3OSll/1V6ly actuating said means when the "same is not rendered effective by suction.

12. In: a device of the character described, the comb nation of a reservoir for l quid fuel having an atmosphere inlet, an outv flow connection and an inflow connection from a'lower source of liquid fuel supply, a" chamber ,pivdtally supported in said reservoir having connection with a source of suction exterior'to said reservoir and aniir let adapted to register with the inflow connection of the reservoir whenever the cham-v ing so pivoted that when empty of liquid fuel it is overbalanced in the direction for forming below the normal level of the fuel her is in filling position,nsaid chamber bein said reservoir a connection'between said j inflow connection and inlet, whereby liquid fuel is sucked thereinto' from said lower source of liquid fuel supply.

13. A liquid fuel vacuum-feed device comprising a reservoir, an inflow connection from a lower source of liquid fuel supply, a chan'iber pivotally supported by said reservoir, a conduit carried by said chamher and adapted to form a butt connection} I with the inflow connection below the 1101s mal level of the. fuel in'said reservoir, a

suction connectionicarried by said reservoir, an opening in'said chamber adapted to register with said suction connection, and

means for closing said suction connection.

, 14. In an apparatus for utilizing the suc- Y tion of an engine for supplying a carbureter with liquid fuel, the combination of a reservoir, an outflow connection carried thereby, a supporting member mounted therein, an inflow connection from aflower source of liquid fuel supply,"a chamber eccentrically pivoted to the supporting me1nher, a conduit extending downwardly from said chamber and adapted to form a con-- nection with said inflow connection, a suction connection carried by said supporting member, a connection betweensaid chamber I and said suction connection, andmeans for closing said suctionconnection actuated by movement of said chamber away from said suction connection under the weight of the liquid directed thereinto.

15. In a device of the lass described, the combination of a reservoir for liquid, an atmosphere inlet, an inflow connection, and an outflow connection, a supporting element, a chamber pivotally mounted on said element and adapted whenempty to be overtween the chamber and inflow connection when the chamber is in the empty position, a suction connection carried by said supporting element, and means drawn into closed position by pivotalmovement ofsaid chamber for closing the suction connection. 16, An apparatus for utilizing the suction direction, a connection be -Q i ed a con n'e'c on between sa d means and chamdirected thereinto "for, closing said suction of an engine for elevatingliquid fuel from,

a tank to a point above aca-rbureter including a reservoir, a chamber tiltably mounted therein, an inflow connection within said reservoir having a butt connection with said chamber, af suction connection, and means drawn into closed position by the movement of the chamber under the'weight of the liquid connection;

17 ajdevice of the class described, the

combination of a reservoir forliquid; fuel,

an atmosphere ,inlet, outflow, connection," an inflow connectlon'fiom a lower source ofl1q111Cl' f 1llsupply, a chamber tiltably' 1n said receptacle, suction means,

ber,afdeflectingelement carried by said chamber, 'e-Xteriorly thereof,a nd a connec tion between the chamber and inflow connection whereby liquid is Q sucked t-hereinto' from'said lo wersource. of liquid supply.

18". Ilia device of the class described, the

combination 'of'a reservoir, an atmosphere inlet, an .outflow conduit and an inflow connection' from a lower source ofliquid fuel supply, a supporting element mounted 1n the receptacle, a 'sucti'on connection carried by said element, rectilinear movable means for closing the suction connect1on', a 'suc tioii chamber adapted to register with said inflow connection, and, means operated by .the' liquid insaid reservoir for actuating the'jmeans forv closing the suction connection. 'f

19."In a device of the class described, the

combination of a reservoir, 'a liquid supply inlet,"'a'c hambernnovably 'mounted in the I v reservoir and adaptedavhen liquid-filled to 'a'io fredeterm-ined "degree to be overbalanced in one direction, a conduit carried by the chamber havi'ng aflbutt connection with said suppl'y inlefl'a 'suc'tioirport, and means actua-ted by movement of, the chamber away port when "liquid-filled for closing from said said port. I

2on1 'a device of the class'described, a

reservoir, a. chanib'entiltably mounted therein,"'an inflowconduit having abutt connection 'with said chamberfa' suction 'connec{ tion for said Chambe'r,'and rectilinear movable means for closing said connection.

' 21. In a device ofthe class described, a reservoir, a"chamber tiltably mounted therein, a liquid inlet connection from a lower source of liquid supply, a butt connection between said chamberfand connection below" thenormal level of the fuel in said reservoir,

7 asuctio n connection'for said chamber, means for closing said suction connection, and a float for actuating said last-named means.

22. A fuelfeeding system forengines including the combination of a reservoir havmgf an; 1nflow' connection from a source of fuel, and an outflow connection adapted to filling .position, said butt con-n be connected with a, carbureter, a chamber movable 'mounted in" saicl' -reservoir and having an inletadapted to'registeriwithsaid inflow connection in the fillingp o'sitioii of said chamber, a suction connection, a, tubular valve adapted to control the suction connection, and means comprising an an inlet adapted to register with said inflew connectioi ifin the filling position of -saidf chamber,a suction conneetion to themanifold-of an engine, anda boX like; projection on, said chamber having". a, butt connection withsaid suction'conne'ction' her is in the filling position. if

when the chain- I v i openended air chamber for 0O11t1'Olllngtl1Q actuation of pted to be: i

QQCQA fuel feeding system forengines including" the combination of a reservoir hav mg an inflow connection from a source of fuel and an outflowconnectiou adapte'dlto be.

connected with a carbureter, achamber movably mounted in sai'd'reservoir and-having,

an inletlajdapted to register with sa id infl ow connection in the fill-mg position-of' said chamber, a suction connection to themanifold Iof an engine, andatubular valve for controlling said suct on connection.

25. A fuel feeding system for engines including the combination of a reservoirhaving an inflow conneetion from la. source of fuel an outflow cennectieii adapted to,

be 'connected with a carbureter, a ch amber movably mounted in said re; rvoirandhaving an inlet adaiitedto register said inflow connection in the fillingi position of said chamber, 'a suction connectien to the manifold of an engine, a tubular ivalve for.

controlling said suction-connection, and an arm carried by the chamber: for sa'idvalve. i t i i i 26. A fuel feedingsystem .for engines including the combination of a, reservoinhaV ing an outflow connection adapted be connected witha carbureter, eh amber mov-l- -defies ably mounted in said reservoir, an ope n V.

ended inflow connection fromfa sourceof fuel, and an open-ended inlet,- carried by said chamber having a butt ,coiineetio niwith said infloweonnectlonwhen the chamberas in the normally below the'leveliof the reservoir. I

H '27L A fuel feeding system forfengines includ ng the combination lof a reservoir having an IIIflQW CO HIIGCtI OII from a-source of:

fuel, and an "outflow connection to ai car-l bureter, a chamber :movably:mounted in said Y i reservoir and having inlet and "outlet "can" et li l is l'lnwd nections, said inlet connection communicating below the normal level of the fuel in said reservoir with the inflow connection when the chamber is in filling position, said inlet and outlet connections being opened and closed by themovement of the chamber to bring the chamber into and out of filling position.

28. A fuel feeding system for engines including the combination of a reservoir having an inflow connection from a sourceof fuel, and an outflow connection to a carbureter, a chamber movably mounted in said reservoir, a suction connection to the manifold of an engine, and a downwardly projecting tube interposed between said inflow connection and chamber whereby movement of the chamber into and out of filling position permits suction to draw fuel into the chamber and allows fuel to flow out of said chamber.

29. A device of the class described comprising a reservoir for liquid fuel having an outflow connection, means connecting said reservoir with a lower soure of liquid fuel supply and permitting the flow of liquid fuel therein in only one direction, a I

prising a reservoir having an outflow conchamber movably mounted in said reservoir, an inlet pipe for sa1d chamber-"extending downwardly therefrom lIltQOPGlELlZlVtB relation with said means when the chamber occupies a predetermined position, and a suction connection to the intalie manifold of an engine for said chamber, said chamber being adapted to move under the weight of liquid fuel flowing thereinto to empty through said inlet pipe into said reservoir.

80. In a device of the class described, a reservoir having an outflow connection to a carburetor, a chamber tiltably mounted therein, an inflow connection for said reservoir connecting the latter with a lower source of fuel supply and having a butt connection with said chamber below the normal level of the fuel in said reservoir when said chamber is tilted to'filling position, a suction connection for said chamber, and rectilinearly movable means for closing said suction connection.

31. In a device of the class described, a reservoir having an inflow connection from a source of fuel and an outflow connection to a carburetor, a chamber movably mounted in said reservoir having an openv ing therein adjacent the upper portion thereof and having an inlet adapted to register with said inflow connection when said chamber is in filling position, a suction connection for said chamber, and means for closing said suction connection, said opening being adapted to form a passage through nection from a lower source of fuel supply, an outflow connection to a carburetor and an atmosphere inlet, a chamber movably mounted in said reservoir having an atmosphere inlet and an inlet pipe adapted to register with said inflow connection below the'normal level of fuel in said reservoir when the chamber is in filling position, a suction connection for said chamber, and means for closing said suction connection, the atmosphere inlet in said chamber being adapted to register with said suction "connection when the chamber is in filling position.

33. A device of the class described comnection to a carburetor, an inflow connection for connectlng sald reservoir to a'lower source offuel supply, a chamber movably' mounted in said reservoir and having an Inlet commun cating wlth said inflow connection below the normal level of fuel in said reservoir when said chamber-is in-"fill-' ing position, and a suction connection coinmunicating with said chamber when the latter is in filling position.

34, A device of the class described comprising a reservoir having an outflow connection to a carburetor, an inflow connec tion for connecting said reservoir to a lower source of fuel supply, a chamber movably mounted in said reservoir and having an inlet communicating with said inflow connection below the normal level of fuel in said reservoir when said chamber is in filling position, said chamber being adapted to empty through said inlet below the said level of fuel when the chamber moves to emptying position, and a suction connection communicating with said chamber when the latter is in filling position.

In testimony whereof I have signed this specification.

- ARTHUR UNDERWOOD. 

